Browse > Article

Corrosion Rate of Buried Pipeline by Alternating Current  

Song, H.S. (R&D Division of Korea Gas Corporation)
Kim, Y.G. (R&D Division of Korea Gas Corporation)
Lee, S.M. (R&D Division of Korea Gas Corporation)
Kho, Y.T. (R&D Division of Korea Gas Corporation)
Park, Y.S. (School of Materials, Yonsei Univ.)
Publication Information
Corrosion Science and Technology / v.4, no.1, 2005 , pp. 1-7 More about this Journal
Abstract
An alternating current (AC) corrosion on buried pipeline has been studied using coupon and ER probe. Coupons and ER probes were applied to the sites from high value of AC voltage to low value based on the survey of AC voltages on buried gas transmission pipeline over the country. Parameters such as AC current density of coupon, AC voltage, cathodic protection potential, soil resistivity and frequency were monitored continually. Corrosion induced by AC was observed even under cathodically protected condition that met cathodic protection criterion (; below -850 mV vs. CSE). Corrosion rate was affected mainly not by AC voltage but by both of frequency and AC current density. An experimental corrosion rate relation could be obtained according to effective AC current density, in which AC corrosion rate increased linearly with effective AC current density, and its slope was 0.619 in coupon method and 0.885 in ER probes.
Keywords
AC corrosion; coupon; electric resistance; cathodically protected pipeline; interference;
Citations & Related Records
연도 인용수 순위
  • Reference
1 J. F. Williams, Material Protection, 5, 52 (1966)
2 G. Peez, Gas Erdgas, 134, 6 (1993)
3 M. A. Pagano and S. B. Lalvani, Corrosion Science, 36, 1 (1994)   DOI   ScienceOn
4 Y. G. Kim, International Corrosion Congress, Capetown, South Africa (1999)
5 G. Heim and G. Peez, Gas-Erdgas, 133, 3 (1992)
6 D. Funk, W. Prinz and H. -G. Schoneich, 3R International, 31, 6 (1992)
7 Kajiyama and Y. Nakamura, Corrosion, 55, 2 (1999)
8 U. Bertocci, Corrosion, 35, 5 (1979)
9 Y. G. Kim, 194th Electrochemical Soc. Conference, Boston (1998)
10 A. W. Peabody, Control of Pipeline Corrosion, NACE, Houston, 1967
11 NACE standard RPOI77, NACE (1983)
12 ANSI/IEEE Standards 80 (1986)
13 P. Hartmann, 3R International, 30, 10 (1991)
14 CIGRE Working Group 36.02, 'Guide on The lnfulence of High Voltage AC Power System on Metallic Pipelines', CIGRE (1995)
15 R. A. Gummow, R. G. Wakelin and S. M. Segall, CORROSION 98, paper No. 566, NACE (1998)